Rapid scan LADAR 3D imaging with compact digital beam formation

Details Rapid scan LADAR 3D imaging with compact digital beam formation Rapid scan LADAR 3D imaging with compact digital beam formation

2008-03-19

2010-10-26

Tarcza, Thomas H (Department: 3662)

Optics: measuring and testing

Range or remote distance finding

With photodetection

C356S005100, C356S005150

Reexamination Certificate

active

07821619

ABSTRACT:
A LADAR system for coherently imaging a target within a volume has a modulated laser transmitter at a frequency and a receiver. The receiver has a plurality of lenses, each with its own detector. Each detector is supplied by a centrally located local oscillator tuned to the frequency. The paths from the local oscillator to each detector, as well as the delay within each lens/detector combination are measured during a calibration. A calibrating reflector reflects a test signal during the calibration at many frequencies, temperatures and accelerations. Measurements of paths and delays obtained during the calibration are stored, and used to phase compensate subsequent target reflections for coherent processing.

REFERENCES:
patent: 5892575 (1999-04-01), Marino

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